With respect to communication, the goal is to make information
easy to find and publish. To send a message, you simply speak or type it
into your computer or phone to nobody in particular, and it goes to
anyone who cares, human or machine. If your message is in the form of
a question, then it goes to anyone who can or has already answered it. If it is in the
form of a statement, it goes to anyone whose question (past or future)
it answers. Sending a message may initiate a public conversation
with others that share your interests. When enough narrowly intelligent experts
are added to the network, you should not care (or may prefer)
that your conversation be with machines rather than humans.

The document further proceeds with economics estimates and technological evaluations, and (IMO) is only somewhat related to the AGI problem, mentioned in the title of the communicated idea.

However, the common knowledge space described is an astonishing perspective towards a global, information-driven community. All the web2.0-based social network things are stone age compared to the common knowledge space.

Tha main relation to the AGI problem is that all the messages have to be processed by a computational entity capable of "making sense" of those messages, in order for the knowledge space to work as envisaged.